The "/annotate" page:

URL: /annotate?checkin=ID&filename=FILENAME
URL: /blame?checkin=ID&filename=FILENAME
URL: /praise?checkin=ID&filename=FILENAME
Show the most recent change to each line of a text file. /annotate shows
the date of the changes and the check-in hash (with a link to the
check-in). /blame and /praise also show the user who made the check-in.
Query parameters:
checkin=ID The manifest ID at which to start the annotation
filename=FILENAME The filename.
filevers Show file versions rather than check-in versions
limit=N Limit the search depth to N ancestors
log=BOOLEAN Show a log of versions analyzed
w Ignore whitespace